Abstract
AbstractIn this work, the effect of Pt−Ni(OH)2 nanoparticles on the activity and reaction pathway of glycerol oxidation was studied. For this purpose, small Pt (4±0.2 nm) and Pt−Ni(OH)2 nanoparticles (4.7±0.4 nm) supported on Vulcan carbon were synthesized. Ni(OH)2 were found in the vicinity of Pt modifying the lattice parameter, inter‐planar distance and binding energy of Pt. Electrochemical evaluation indicated that Pt−Ni(OH)2/C had better electrocatalytic activity than Pt/C offering a higher current density (almost 45 mA mg−1), and lower onset (−0.3 V) and oxidation peak potentials (0.04 V). The improved activity was associated to the OH groups found in the vicinity of Pt active sites, facilitating the charge transfer due to a bifunctional mechanism. The in situ evaluation confirmed that the incorporation of Ni(OH)2 led to higher electron transfer due to short‐chain byproducts such as glycolate, mesoxalate and formate, which were found at the oxidation peak potential.
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